frank tyler



(No Model.)

'2 Sheets-Sheet 1.

T. F. TYLER.

. Hur-Elm' IIIII Hatohway Guard Mechanism.

Patented Aug. 3,1880.

:man

(No Model.) 2 Sheets-Sheet 2.

T. F. TYLER. Hatohway Guard Mechanism. No. 230,840. Paented Aug'. 3,1880.

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N. PETERS. FHOTO-UTHOGRAPHER. WASHINGTON. D C.

NTTED STATES PATENT Orrice.

T. W. TYLER, AND O. O. BEEDE, ALL OF SAME PLACE.

HATCHWAY-GUARD MECHANISM.

SPECIFICATION forming part of Letters Patent No. 230,840, dated August 3, 1880.

Application filed May 2:2, 1880.

To all whom it may concern Be it known that l, T. FRANK TYLER, of Lynn, in the county of Essex and State of Massachusetts, have invented certain Improvements in Operating Mechanism for Hatchway-Guards, 0I" Which the followingis a specication.

This invention has for its object to provide improved mechanism for operating verticallysliding guards or gates placed at the doorways or openings into the shaft or well of an elevator, and relates to that class of hatchway-guards in which each guard or gate is provided with a slide or counterpoise connected thereto by a cord passing over pulleys, so that the slide and guard will move in opposite directions, and the elevator is provided with two separate devices, one to 'directly lift the guard when the elevator is going up, and the other to lift the guard by bearing downwardly upon the slide or counterpoise when the elevator is going down, means being provided for releasing each guard and allowing it to close by its own weight when the elevator passes a given point in its ascent or descent.

My invention consists in certain improvements in themechanism on the elevator, wherebythe guards are raised and lowered, all of which I will now proceed to describe and claim.

Of the accompanying drawings, forming a part of this specification, Figure 1 represents a rear elevation of an elevator, lookin gtoward the front opening, having the vertically-slidin g guard portions. Fig. 2 represents a vertical section online .r Fig. l. Fig. 3 represents a transverse section on line y y, Fig. l, looking downwardly upon the elevator. Fig. 4t represents an enlarged section on line z z, Fig. 3. Fig. represents an enlarged section on line c c', Fig. 3. Fig. 6 represents a section ou line z2 z2, Fig. 3.

The same letters of reference indicate the same parts in all the igures.

In the drawings, A represents an elevator of any suitable construction, the kind shown being an ordinary merchandise-elevator, composed of a platform, a, and an upright frame, b, to the top of which the hoisting rope or ropes c are attached. B represents one of the (No model.)

floors of the building, and O represents a vertically-sliding guard or gate, which extends sides of the opening.

It will be understood that each floor will have a guard, C; but as all are operated alike, only one will be described. f

D represents a slide, which runs in a vertical groove, E, in the frame-work of the elevator-shaft, and is connected by a cord, F, with the guard O, said cord passing over pulleys G G2, so that the slide moves oppositely to the guard. The guard is provided with an arm, O', and the slide is provided with an arm, D', said arms co-operating, respectively, with dogs H H on the elevator, as hereinafter described.

The dog H is a metallic arm pivoted at h to ears on a frame, I, which is rigidly attached to the cross-bar of the elevator-frame I). The dog H is adapted to swing in a vertical plane when left to itself, but it is prevented from swinging, and is made rigid, excepting at intervals, by a holding device consisting ot' a square bar, J, adapted to slide in lugs or bearings K K on the frame I, and pressed by a spring, L, against the end of the dog H, the adjacent ends of the dog and bar being provided with enlarged faces fi t. The bar J is normally locked in the position shown in Figs. 2, 3, 4 by a key or pin, M, passing through 'a hole in the bearing K into a hole in the bar J, said key preventing the bar J from moving longitudinally away from the dog H.

It will be seen that so long as the bar J is so held the dogH isimmovableand is practically a part of the frame I. The dog is thus adapted to engage with the arm C of the guard as the elevator rises, and lift said guard in its guides, so as to remove it from the lower portion of the opening it protects, and hold it in the position shown in Figs. 1 and 2 while the elevator is at rest.

The key M is connected by a rod, N, to a bell-crank lever, O, pivoted to one of the side pieces of the elevator-frame b. One arm of the lever O projects laterally beyond the frame, so as to strike a stud or pin, l?, on the vertical guide-beam Q when the elevator reaches a cer- IOO tain point in its ascent. The leverO is tilted by the pin P, and caused to withdraw the key M from the bar J, said barbeingth us unlocked so that it will not'hold the dog H. the latter swinging downwardly under the weight ot' the guard, as shown in dotted lilies in Figl. and allowing the guard to i'all, after which the springL forces the bar J outwardly and raises the dog H to its former position, while a spring, S, forces the key M into the bar J and locks it, the dog H heilig thus made rigid, as before.

The pin P is so located that thelever O will meet it, with the result `just described, as soon as thc elevator-platform has risen a short distance above the floor, so that the guard will be returned to place before the opening into the elevator-shaft is entirely cleared.

rI *he dog H is held by a bar,' J, which is locked by a key, M, and unlocked by apin, P, on the guide-beam Qon the opposite side of the elevator, and a bell-crank lever, O, 'connected to the key M by a rod, N', the operation of holding and releasing the dog H being the same as that ot' holdlng and releasing the dog H. The dog H is arranged to swing upwardly when released, and before itis released it bears upon the arm D ot' the slide D when the elevator is descending', and, by depressing said slide, raises the guard C, so that the guard is in thepositiou shown in Figs. l and 2 by the time the platlorm oi' the elevator reaches the level ot' the floor. rlhe dog H is unlocked by the pin P and intermediate mechanism shortly after the elevator-platform passes below the iioor, thus releasing the guard.

The dog H is provided with a spring-tip, U, which yields and enables the dog to pass the arm G of the guard without effect when the elevator is going down, and the dog H is provided with a similar tip, U', which passes the arm D ofthe slide without effect when the elevator is going up. The levers O O are provided with spring-tips for, the same purpose.

To enable the elevator to pa-ss by the guard without operating it eitherin going up or down, I provide the bell-crank levers OO with cords V V', extending over suitably-arranged pulleys to a point on the elevator within coiivenient reach of the operatorwho is enabled, by pulling these cords, to turn the levers O O and withdraw the keys M M from the bars J .J, thus unlocking said bars and leaving the H the slide D, which is moved upwardly by the descent of the guard, will overtake and be partially checked, with the guard, by the dog H', and when the elevator is descending, and the slide D is released by the dog H, the

guard, in its descent, will overtake and be pai"-V tially checked by the dog H, the guard in both cases moving at the same rate as the elevator after its descent is partially checked.

The dog H may be located at the top of the elevator'i'rame, as shown, or placed at a lower point; but the slide D must be located with reference to the location otl the dog H so that said slide will be moved by the dog H at the proper time and to the proper extent to sufficiently raise the guard by the time the descending elevator reaches the level of the door.

I am aware that rising and falling hatchway-guards have heretofore been combined with self-shooting bolts on the elevator, operating automatically to open the guards both in the ascent and descent oi' the elevator.

I am also aware that means have been provided for making the self-shooting bolts inoperative, so that the elevator will pass any ot' the guards without raising them.

I do not, therefore, claim such combination and means broadly.

My improved mechanism vFor raising and releasing the guard is quicker and more positive in its operation than any ot' which I am aware, and o'ers practically no resistance to the movements of the elevator.

rIhe cords V V', with the bell-crank levers O O and keys M M', constitute simple, convenient, and ei'ective means for rendering the dogs H H inoperative.

I claim- 1. As a means for automatically raisingand releasing a vertically movable hatchwayguard, a dog pivoted to a portion of the elevator, combined with a normally-locked holding device, substantially as described, to make said dog rigid, and thereby enable it to move the guard, and unlocking mechanism to unlock the holding device and permit the dog to yield and release the guard when the elevator reaches a given point, as set forth.

2. rI he combination of a dog pivoted near one end to a suitable support on an elevator and provided atits pivoted end with a suitable face, a bar sliding in bearings on the elevator and provided with a face which is pressed by a spring against the face of the dog, a spring-key to automatically lock the bar to one of its bearings, a fixed stud or pro jection near one side of the elevator, and intermediate mechanism in the elevator to engage with the stud and momentarily withdraw the key from the bar, as set forth.

The combination, with an elevator, ofthe dog H, adapted to swing downwardly and provided with a locked holding device which is unlocked by the upward movement of the elevator, and the dog H', adapted to swing upwardly and provided with a locked holding device which is unlocked by the downward movement ot' the elevator, said dogs being adapted to engage, respectively, with a vertically-sliding hatchway-guard and with a IOO IOS

IIO

slide connected, as described, to said guard, as set forth.

4. In combination with the locking and unlocking mechanism of the dogs H H', the cords V V', whereby said mechanism may be made inoperative, as set forth.

5. The combination of the elevator, having the normally rigid dogs H H', with a risingand-falling guard, C, having an arm, C', and a slide, D, having an arm, D', said arms C and D being not only operated, respectively,

by the dogs H H' to raise the guard, but also arrested, respectively, by the dogs H H after the release of the gua-rd, as set forth.

In testimony whereof l have signed my name 15 to this specication in the presence of two subscribing witnesses this 18th day oi' May, A. D. 1880.

T. FRANK TYLER.

Witnesses:

R. S. PERKINS, C. F. BROWN. 

